烟叶分级（Tobacco grading）.docVIP

烟叶分级（Tobacco grading） Leaf structure is an important factor to evaluate the quality of tobacco. Identification method is to see, touch, but emphasize the touch. Dont touch the flexible handle, veinlets without obvious protrusions, seeing bubble, leaf blade structure shows good ability. Tightly structured tobacco leaves have a hard, brittle feel on their hands. 3. the weight of the thickness, density, or unit leaf area of a leaf, usually expressed as a thickness. Status is tobacco, a more intuitive and specific concept. According to the thickness and density of the tobacco leaves, combined with the perceptible difference range, the tobacco is divided into 5 grades: medium, slightly thick, slightly thinner, thick and thin. The judgement of the identity also depends on seeing, hand touch. Because the thickness of the tobacco leaf is thin, it is difficult to distinguish the thickness of the hand with other features, but it is not difficult to distinguish the degree of thickness. 4. oil means a soft, semi liquid or liquid substance contained in tobacco leaves. The oil over water content of tobacco in appropriate circumstances, the appearance of leaf surface smooth, soft touch, no light, stiff feeling. On the contrary, less oil leaves, see dull, hand feel hard crisp. Generally speaking, oil partition is regarded as an important factor in the division of grades, especially in middle leaf tobacco. There is a certain demand for oil, and the lower and lower leaves generally dont require high oil content. The grades of oil are divided into many, there are, slightly, and little. 1: refers to the rich oil, apparent oil. The blade has strong toughness, good elasticity, strong restoring ability when the hand is loosened, and the pulling force is good, and the surface of the leaf is oily. There are still: refers to the oil, apparent oilfeel. The leaf blade has toughness, good elasticity, good pulling resistance, and oily reflection on the leaf surface. The slightly: slightly less r